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Chapter 4 – Network Security

The only system which is truly secure is one which is switched off and unplugged, locked in a titanium lined safe, buried in a concrete bunker, and is surrounded by nerve gas and very highly paid armed guards. Even then, I wouldn’t stake my life on it .An open security model is the easiest to implement . Simple passwords and server security become the foundation of this model. If encryption is used, it is implemented by individual users or on servers. | Chapter 4 - Network Security wnr 11IIIIIIIIIIII11II111II111 III 11IIIIIII11II111II111IIIIIIIII BACHKHOA NETWORKING ACADEMY CCNA Exploration 4.0 CISCO 1 Why is Network Security Important Work Vote Purchase Live and Play Learn Travel Ị Bank Medicate Học viện mạng Bach Khoa - Website www.bkacad.com Threat Capabilities 8ACHKHCA NETWORKING ACADEMY HighA Sweepers Back Doors Packet Forging Spoofing Stealth Diagnostics Password Guessing Password Cracking Hijacking Sessions wn Exploiting Vulnerabilities Sniffers Sophistication of Hacker Tools T Technical Knowledge quired Low 1985 1990 1995 .